Based on Intel's P35 chipset, ASUS P5K Deluxe and ASUS P5K3 Deluxe motherboards comes are designed to support the next generation 45nm CPU; and up to 8GB of dual-channel DDR3 1066/800 MHz (P5K3 Deluxe) or dual-channel DDR2 800/667 MHz (P5K Deluxe). Both supports 1333/1066/800 FSB CPU and Crossfire. They are perfect to see differences between DDR2 or DDR3 memoryhttp://translate.google.com/translat...language_tools